Pitch roof this is where tiles or slates are used and a void is usually created underneath.
Planning portal roof.
In most situations this work will need building regulations approval.
You will need approval however if.
Planning permission is not required for repair and or maintenance works to a roof including re roofing provided that the materials used are the same as those being replaced.
You do not normally need to apply for planning permission to re roof your house or to insert roof lights or skylights as the permitted development rules allow for roof alterations subject to the following limits and conditions.
About planning portal adverts if you want to carry out repairs on or re cover less than 25 per cent of the area of a pitch or flat roof you will not normally need to submit a building regulations application.
You carry out structural alterations.
Flat roof this usually consists of felting which has a slight fall to allow rain water to drain off.
About planning portal adverts after a period of time the roof on existing buildings will need to be replaced.
They do not protrude more than 150mm beyond the plane of the roof slope they are no higher than the highest part of the roof.
Any alteration to project no more than 150 millimetres from the existing roof plane.